Properties of the Number 28146

Twenty-Eight Thousand One Hundred Forty-Six

Basics

Value: 28145 → 28146 → 28147

Parity: even

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 4691

Divisors: 1, 2, 3, 6, 4691, 9382, 14073, 28146

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111110010

Octal: 66762

Duodecimal: 14356

Hexadecimal: 6df2

Square: 792197316

Square Root: 167.76769653303344

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of simple permutations of degree n. A111111

a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero n-gonal pyramidal numbers in exactly n ways, or 0 if no such integer exists. A350210

E.g.f. satisfies A(x) = 1 + x·A(x)³ * (exp(x·A(x)²) - 1). A371271

Number of subsets of {1, ..., n} that are sum-free but not double-free. A88811

G.f.: (x+4·x³+x⁵)/((1-x)²*(1-x²)²*(1-x³)²). A83708

Numbers n such that n·2²²⁸¹ - 1 is prime. A265504

Expansion of 1/((1-4x)(1-7x)(1-8x)(1-10x)). A28146